Ozone generator



Aug.6, 1935. F. E HARTMAN ZOOS OZONE GENERATOR y Filed March '7, 1931 2 Sheets-Sheet 1 Aug. 6, 1935. F. E. HARTMAN OZONE GENERATOR Filed March 7, 1931 2 Sheets-Sheet 2 A LEE J FVHH! VH ril l y Patented Aug. 6, 1935 The invention relates generally to ozone generatorsl More particularly Vthe invention relates to that type of generator which is adapted for use on high frequency electric circuits where highcur- 5,V rent'densities obtain. l

(One object of theinvention is to provide an ozone generator of thistype which includes positive means-for cooling byliquids the electrodes and l the dielectric in order to adapt it for use on high v1'0 frequency'cir'cuits.

Y Another 'object of the invention is to provide ani'ozone generator of the type under consideration which can be readily assembled and dismantled to permit of Iready replacement'of the parts when'necessary. v Y Other objects of the invention and the various advantages and characteristics of the present genefra'tor costructionwill he apparent from the following Ydetailed description. 1 .20F A 'The inventionconsists inthe several novel fea-r tures whichare hereinafter set forth and are more particularlydeiined by thev claims at the conclusion hereof.v

In the drawings Vwhich-accompany and form a platito'fv this specification or `.disclosure and in Y Whichllike numrals'of reference denote corresl spending parts'throughoutthe several views: Fig. lis'y an elevation-of;'agenerator embodying the l iriveritiori.V 2 is a Vertical section.

VFig. 3 is a plan view of the generatorand Fig.4 ia's'ctifenalview takenalong line 4--4 of Fig. 2. f The generator which forms the subject matter of thefinvention 'comprises an inner tubular electrede I0, a; tubular dielectric I I and an outer electrede 9Js`ecuredl on the outer periphery of the ,dilectriefA "easing is provided to enclose thev dielectric- `and outer electrode, and comprises a tubular body I2. The lower end of the lloody I2'fis'co`nined in an annular flange I3'on the 4.0 topcifv a hollow head I4 formed of a casting.

{Iheiipper end of thebody I 2 isconned in an annular flange" I5 depending from a hollow head' I6.

A cap II fits over and closes the open top of the head I6. A series ortie-bolts I8 extend through ii-5f lugs I9 onthecapill, lugs' Iaon head IB, and

' lugs 20 projecting from the lower head I4, and

" vserve removably to' clamp together both heads,

- the'casing-body' and the cap. The lower end of the body` l2 is seated on a packing ring 2| which rests on an annular shoulder or wall 22 integrally formedfwitl'i theheadM. An annular shoulder or'wa1l23uintegral with the casing IE, is clamped against theupper edge of the body I2. A packing g gasket 24 is interposed between the cap I'l and the l.. upper head I6. The tie bolts I8 clamp the upper ,"Tanrorrie Y Frank E. Hartman, Chicago, Ill., assgnor of onethird to Fred H. Montgomery and one-third to W. Ray Montgomery, both of Chicago, Ill.

'Y n Application March 7, 1931, Serial No. 520,892 I l l n s claims. (el. 204-32) and lower heads to the body to form air-tight chambers in the heads respectively.

The lower end of the inner electrode has a tubular extension ItaI of reduced diameter and is se-v cured in a sleeve 26 of porcelain or other insulating material to insulate the inner electrodefrom the lower head I 4. The tubular portion Illa of the inner electrode has an annular shoulder 26a f1tting in a socket VEll in the upper end of the porcelain sleeve 26. A lling of suitable cement 28 in the socket 2Il above shoulder 26a and around the tubular portion Illa 0f the inner electrode secures the insulating sleeve to the electrode so they will be removable and replaceable as a unit. The insulating sleeve 26 is formed with an annular shoulder 21o which seats on the lower wall of the head I4; 'I'his sleeve and the inner electrode supported thereby are supported wholly from Vthe lower head I. The upper end of the inner electrode has a constricted portionv- IIlb and,V is closed to form a chamber throughi which cooling liquid will flow. The sleeve 26, with the inner Velectrodejs secured in the head lIll against upward displacement by a split ring 29 held in a peripheral groove in the sleeve and having its outer portion projecting sufficiently to engage and lapthe lower wall of the head- Ill.V A'packing box, comprising packing 30 aroundr ring 29 and a gland 3I which is screwthreaded. to a downwardly projectingnipple onk the head I4, forms a huid-tight connection between the sleeve 26 and the head I4. y

The tubular dielectric IIY is cylindrical or straight, and passes throughv and iits in the lower wall 23 of .head AIand the upper wall 22 of Both ends of the dielectric are open' to permit air toiiow therethrough and around i The upper end ofthe dielectric has fa ared 'annulary shoulder to position centrally and support the dielectric in the The outer peripheryof the inner electrode is spaced from the innerperiphery of the dielectric, as welly understood in the art.

Anlair pipe 32 is co'nnectedtcv` the vside wall of head I6 to deliver vair into Va vertical duct 33 formed in said head. The lower end of duct 33 is closed and its upper end communicates with a cross-duct 34 which is formed in the cap I9, and terminates in a,` central downwardly extending opening 35. "A tube or nipple 36 of porcelain insulating material is .secured in opening 39 in cap-i9, and extends downwardly from said duct 35 to discharge air centrally into the dielectric and above the inner electrode. vides for maximum insulation 'at the inlet end An air outlet pipe `3l forair the inner electrode l`Il);

This tube 36 proof the. dielectric,-

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is connected to the side wall of the lower head I4.

Provision is made for circulating the cooling liquid through the inner electrode. For this purpose a hollow coupling 38 is secured to the lower end of the tubular extension Illa of the inner electrode which projects below the insulating sleeve 26. An inlet pipe 39 for the cooling liquid is screw-threaded to oneside ofsaid coupling. An outletV pipe 40 has its lowerend screwthreaded into the lower wall of coupling 38 and extends upwardly to a point adjacent the top of the inner electrode, so that the liquid will flow from the upper portion ofthe electrodeA downwardly through pipe 40. 'Ihe space between pipe 40 and the inner Vperiphery* of portion IUa. of the inner electrode forms a chamberfthro'ugh which the cooling liquid will now upwardly from couf pling 38 to cool the inner electrode." A discharge off the liquid from pipe 4I).V

The invention also provides means for' circulating cooling liquidv around the tubular casing I2 to` cool the outer electrode andthe dielectric. This means comprises a jacket composed of a tube or' body 42 provided at each vof itsends with a ring 43 which is welded to said tube. Each ring 43 iits'around the body I2; and'is provided vwith a Vchannel containing packing 44; kA packing glandv or4 ring 45 is secured to each ring 43 by screws 46 to cause'the Vpackings to form aV liquid-tight jointV between the jacketrfandY the vcasing; I2. These packings clamp the'jacket to'casing'body I2., This makes it Vpossible easily Vto assemble the jacket around the casing I 2,` toremove itV when desired and to slide the jacket along the body I2 to the desiredposition. A 'pipe 41 is connected to the lowerring land serves. to deliver cooling liquid into the jacket. An outlet pipe 48 for the' cooling liquid is connected to theupper ring 43. Y A vertical corrugated copper sleeve I2d is interposed between vcasing-|2 and the outer electrode on'the dielectric to conduct heat to theY the liquid owing body I2, `and also tothe inlet pipe 39 which de-k livers oil to the inner electrode I0. The connection between pipe 39 and'pipe 50 comprises a glass tube I which serves to insulate the pipe 39 from Ythe pipe' 41 :which is connected `to the jacket around lcasing I2 to prevent current from passing from the body yI2 tothe inner electrode. The liquid discharged froml the jacket around body 'I2 through pipe 48 andfromlthe inner electrode through pipe 4I, is conducted by a pipe 52 to a closed expansion tank 53. The connection between pipe 4I and pipe 52 comprises an insu- Y' lating tube 54 of glass't'o preventcurrent from passing from the inner electrode tothe vjacket around body I2. Infpractice, it has been found that oil is hygroscopic',` and it'.'is"desirable'to retain rthe oil in' a -close'd circuit' to prevent lthe accumulation' of moisture Stherein.'V Forthis.y pur-` pose Vthe oil frointhe generator is delivered `into the closed expansion tank-andV the-'circulating lines are closed. This tank VVis providedfwith an air vcocki't'r to permit the air` displacedl by the oil to escape when 'originally iilling kthe system. A suitable heat .exchanger ory cooler 55 isvprovided arounda coil 51 of the `A`line between the expansion t'ankand the inlet of the pump 49 to coolr the oil beforeitfhas returnedA tothe gener- 1 ator. AWater is circulated through the :cooler 55.

dielectricV and the inner electrode. Ypasses through vthe dielectric tube and around A pipe 56 delivers oil from tank 53 into the coil gether by means 'of the tie-bolts I9. `The innerA electrode is l.removably and. concentrically' sustained by thelower head I4 of the casing.V v'llhe dielectric which consists of a straight glass tube canwbe inserted into the casing before the cap I1 The jacket around the body is secured place.

I2, which consists of a straight tuba-can be slipped over the tube (before it'is assembled with the heads.V l A. t

One vof the conductors of a high frequency electric circuit is connected to any suitable partof Y y "the casing which is in electrical contact with the pipe 4I is connected to the couplingv38 to carry.V

outer electrode on the dielectric, and theother conductor is connected to the coupling 38 on the lowerr end-oftheinner electrodefwhichisinsulated from the main Vcasing by sleeve 26 to produce a dischargeacr'oss the gap between the the inner electrode, as wellV understood ingthe art. The pump 49 delivers oil from the tank 53throughv pipe 41V into thejacket aroundfthe tubular casing, andV alsov delivers oil under pressure through pipe 39 to thecoupling Y38. Thejdistribution ci!y the oil from the pump, so it will pass in proper proportions 'through the'outer jacket and through the inner electrodemay Vbe controlled bythe sizeY The air' of the orifice in the deliveryA end of pipeA 41.V AThe oil Vcirculating around the body I2 rcools it, andre Y carries oi the heat generated in the .dielectric and outer electrode which passesfthrough;V the con-V rugated copper conductorIZdf` The owing upwardly through the. inner electrode flows outv through the pipe140 and vthence throughpipe 4I.

The oil from pipes 48-and 4I aredischarged intor the tank 5.3 for recirculation. The heat exchanger cools the oil, sothat it can be recirculated. Thisv vexempliiies fa cooling system for inner and outer electrodes, inwhich thecooling liquidis circulated vin a completely` closed circuitfso that no moisture in the atmosphere will bebsorbed by the oil. The air space inthe upper' portion of the expansion tank'permits the voil toexpend orcontract.V

The invention exemplifies anv ozonegenerator with a closed system for circulating. oilV toeool,

the inner and outer electrodes; it also exemplifies an ozone generator which` is composed o! parts which Acan'l be manufactured ata lowcostandv which can be readily assembledand dismantled whereY repair or replacement ofany of Ythejparts becomes necessary. v Y Y The' invention'is not to be understoodasV restricted to the'details set lorth, since thesemey be modified within the scope ofgthe. appended claims', without departingV fromY thegspiritfand scope of the invention. i .Y Having thus describedfthe invention,A whatV I claim as new and desire to secure by-Letters Pat#L ent,iSI

1. In an ozonegenerator, the combinaticn'of tubular casing comprising a tubular body, hollow f heads at the ends .ofsaid body, a removablecap' forclosing one of said heads, tie-boltslextending between: the cap and the other rhead for` con'- jointly and releasably clamping the body, heads, A

andcap together, tubular electrodes in `the body.

andra tubular dielectric associated with saidgelec` trodes.V ff

2. 4In an ozone generator, the combination of a n tubular casing comprising a tubular body, hollow heads at the ends of said body, a removable cap for closing one `of said heads, means for releas- 'ably clamping the body, heads, and cap together,

tubular electrodes in the body, a tubular dielectric associated With the electrode and arranged y so as to form with one of the electrodes a tubular Y ozone-forming space in communication with the hollow heads, an air inlet and an outlet connection for the heads, the cap being provided with a duct communicating with the inlet connection in one of the heads and delivering air centrally into the casing.

3. In an ozone generator, the combination of a casing comprising a tubular body, tubular electrodes in the body, a tubular -dielectric associated With the electrodes, and a jacket for cooling liquid,

- extending around said body and comprising a tubular memberand packing boxes at the ends thereof, said member being slidable along the cas-` ing-body and secured in position on the body by said boxes.

4'. In an ozone generator, the combination of a casing comprising a tubular body, tubular electrodes in the body, a tubular dielectric associated with the electrodes, and a jacket for cooling uid n around said body, comprising a tubular member opposite sides of the dielectric, an insulating sleeve secured in one end of the casing, the inner elecltrode having one of Aits ends closed and its other provided with a tubular extension extending through and'secured in said sleeve, a tube for cooling iluidextending through said extension and having the inner end thereof terminating adjacent the closed end of the inner electrode, a coupling member secured to the outer end of said extension and abutting against one end of the sleeve so as to hold the extension against longitudinal displacement in one direction with respect to the sleeve, and means connected to the coupling member for delivering cooling iluid thereto for circulation through the inner electrode and discharge via the tube.

6. In an ozone generator, the combination of a casing comprising a tubular body, a tubular dielectric within the body, tubular electrodes on opposite sides of the dielectric, an insulating sleeve inwhich one of the electrodes is secured, extending through one end-part of the casing, and a split ring for securing the sleeve in the casing extending around the sleeve and coacting with said end-part of the casing.

7. In an ozone generator, the combination of a casing comprising a tubular body, a tubular dielectric witln'n the body, tubular electrodes on opposite sides of the dielectric, an insulating sleeve in which the inner electrode is secured, extending through one end-partA of the casing, `a split ring for securing the sleeve in the casing and a packing box around said ring and sleeve.

8. In an ozone generator, the combination of a tubular casing, a tubular dielectric in the casing, a tubular outer electrode around the dielectric, a tubular inner electrode closed at one of its ends and arranged Within the dielectric so as to form therebetween an ozone-forming space, a connection for delivering air into said space comprising a tube of insulating material separate from the dielectric and centrally disposedv and supported in the casing and having an open end spaced from the closed end of the inner electrode but arranged to deliver air thereagainst and into the aforesaid space.

FRANK E. HAR'I'MAN. 

